Harman 300i Wood Insert
15
3-90-300101
Harman® • 300i Wood Insert Owner’s Manual_R13 • 2010 -___ • 04/15
damper closed
damper open
During combustion, the burning of wood proceeds through
several stages. The initial or evaporation stage is where
the moisture in the wood is driven off in the form of steam.
A second stage is where the volatile gases contained in the
wood are released and burned. This represents most of
the wood's heating capacity. The final stage is the charcoal
stage where the charcoal burns the remaining heat content
in the wood fuel. Ash remains after the burning is complete.
Within the primary firebox, two or more of these stages of
combustion are occurring at once.
damper bypass handle
Two important controls - the damper bypass handle and the
air control lever regulate the operation and output of the stove.
To open the front loading door, you must open the damper
bypass, or smoke will spill into the room. In this mode of
operation the combustion gases go directly from the main
combustion chamber to the flue collar and exit into the
chimney.
Lift upward on the damper handle to open the bypass damper
and push down to close it.
note: the bypass damper must be open for smokeless
loading.
air control shown In the
Medium-high position.
air control shown In the
Medium-low position.
Air Control
The air control slide is located on the ash lip below the firebox
door. Using this lever you will be able to vary the amount of
air delivered to the fire, creating a range of heat outputs. The
low heat output setting is with the control located all the way
to the left. The high setting is with the control located all the
way to the right. There are notches cut into the ash lip to
provide reference points for consistent adjustments. Do not,
under any circumstances, alter the configuration or operation
of the air control slide.
Minimum burn rate
- air control fully to the left.
Medium-low burn rate
- air control at or below the first
notch.
air control shown in the full
open position which is to be
used only for start-up and
refueling
